I think this make sense for Mailchimp. The tweet says in 4 weeks advance which I consider long enough to migrate out. Mailchimp also doesn't lock you in. It's

I think this make sense for Mailchimp. The tweet says in 4 weeks advance which I consider long enough to migrate out. Mailchimp also doesn't lock you in. It's easy to export contact out. I run a news letter and use Mailchimp to manage subscriptions, but sending email with SES(Export contact out to csv and call out SES). So I know how hard it's to ensure the complain, the bounce rate...